Ahmed Mohammed Abou-El-Ela received the B.Sc. degree in Mathematics in 1958, from Teachers college in Cairo, and the Ph.D. degree in Mathematics from FüB University, Germany, in 1970, and the Associate Professor in 1976, from Assiut University, Egypt. He is an Professor from 1986 till now at Department of Mathematics at Faculty of Science, Assiut University, Egypt. His research interests include stability, boundedness and periodicity of solutions of non-linear ordinary differential equations of higher order.
